30. Earthquakes primarily happen along: a. Coastlines b. River valleys c. Plate

Question

30. Earthquakes primarily happen along: a. Coastlines b. River valleys c. Plate boundaries d. Population centers 31. Earthquakes only happen in the Earth's lithosphere. a. True b. False 32. S-waves cannot travel through liquids. a. True b. False 33. The mechanism by which rocks store and eventually release energy in the form of an earthquake is referred to as: a. Fault rebound b. Seismic rebound c. Elastic rebound d. Stress fracture 34. The quantity of energy released by an earthquake is a measurement referred to as a. Intensity b. Magnitude c. Stress d. Displacement 35. The location at the surface directly above where an earthquake begins is called the? a. Focus b. Epicenter c. Mojo layer d. Core-mantle boundarv

Explanation / Answer

30).plate boundaries

At the locations where two tectonic plates interact, a boundary between these plates exist. There are three types of boundaries that geologist observe. These boundaries are divergent boundaries, convergent boundaries, and transform boundaries.

31) True

earthquakes can occur only in lithosphere (brittle), not asthenosphere (too ductile)

32)True

S-waves passing from the mantle to the core are absorbed because shear waves cannot be transmitted through liquids. This is evidence that the outer core does not behave like a solid substance. S-waves are not transmitted through the liquid outer core.

33)Elastic rebound

a theory of earthquakes that envisages gradual deformation of the fault zone without fault slippage until friction is overcome, when the fault suddenly slips to produce the earthquake.the mechanism by which rocks store and eventually release energy in the form of an earthquake is termed as elastic rebound

34)Magnitude

the magnitude of an earthquake is a measure of the amount of energy released - an amount that can be estimated from seismograph readings. The intensity, as expressed by the Modified Mercalli Scale, is a subjective measure that describes how strong a shock was felt at a particular location.

35)Epicenter

The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins

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